Transistor device drive circuit

Details Transistor device drive circuit Transistor device drive circuit

1990-06-21

1992-09-01

Stephan, Steven L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 56, 361 79, 361 88, 323281, 323282, H02H 700, G05F 140

Patent

active

051445140

ABSTRACT:
A semiconductor device drive circuit is provided for turning on and off a semiconductor device that comprises a main static induction transistor and a sense static induction transistor. The drive circuit comprisees a first current source having one terminal connected to a power supply and its other terminal connected to said main static induction transistor, a second current source having one terminal connected to the power supply and its other terminal connected to said sense static induction transistor, a third current source having terminal connected to the power supply and its other terminal connected to the first current source, and a fourth current source having one terminal connected to the power supply and its other terminal connected to the second current source. The drive circuit also has comparing and control means for turning the first and second current sources on to apply a bias when the semiconductor device is to be turned on and for turning off the first and second current sources and turning on the third and fourth current sources when a voltage obtained by sensing a current flowing through the sense static induction transistor is higher than a specific voltage.

REFERENCES:
patent: 4008418 (1977-02-01), Murphy
patent: 4428015 (1984-01-01), Nesler
patent: 4731574 (1988-03-01), Melbert

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